MOMENTS OF RANDOM MULTIPLICATIVE
FUNCTIONS, I: LOW MOMENTS, BETTER THAN
SQUAREROOT CANCELLATION, AND CRITICAL
MULTIPLICATIVE CHAOS
This paper determines the order of magnitude of low moments of Steinhaus and Rademacher random multiplicative functions, proving Helson's conjecture about better-than-squareroot cancellation in the first moment. This result also disproves counter-conjectures and has implications for limit distribution and large deviations of these functions, leveraging a connection to critical multiplicative chaos.
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